Is it necessary to serve the whole notice period of a limited labor contract?

Hi sir/madam,

Recently, I joined a company as a digital marketing executive. Now it is 1 month over and my visa is in process & my status changed to e-visa. I am in a limited contract and have a 6 month probation period.

But now I don't want to continue here because I am getting different works. It is not based on my carrier and my position. So I would like to resign from this company. Based on my offer letter, there is a 3-month notice.

Is it necessary to put 3 months' notice? Or is it possible to resign without notice?

My visa is not stamped yet and my medical is not over. Do I get any labor ban?

Please help me with this issue?